Fe (Se, Te) superconducting thick film and preparation method and application thereof

A thick film, superconducting technology, applied in metal material coating process, vacuum evaporation plating, coating, etc., can solve the problems of not meeting the application requirements, and achieve high performance stability and repeatability, high criticality Effect of current and critical current density

Active Publication Date: 2022-04-12
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, most of the Fe(Se,Te) thin films reported so far have thicknesses in the range of 100-200 nm and critical current densities of 10 5 A / cm 2 order of magnitude, so its critical current is below 10A, which is far from meeting the requirements of the application

Method used

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  • Fe (Se, Te) superconducting thick film and preparation method and application thereof
  • Fe (Se, Te) superconducting thick film and preparation method and application thereof
  • Fe (Se, Te) superconducting thick film and preparation method and application thereof

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Embodiment 1

[0060] The present embodiment provides a method for preparing a high-performance Fe (Se, Te) superconducting thick film on a metal substrate coated with a buffer layer, comprising the following steps:

[0061] Step 1, take the Fe(Se,Te) superconducting target material and install it in the target holder in the cavity;

[0062] Step 2, take the metal base tape coated with the buffer layer and wind it in the multi-channel pulsed laser deposition system:

[0063] Step 2.1, winding one end of the metal base tape coated with a buffer layer onto the first reel;

[0064] In step 2.2, the traction metal base belt is wound on the roller shafts of the multi-channel transmission device multiple times to form a multi-channel metal base belt between the roller shafts;

[0065] Step 2.3, fix the other end of the metal base tape on the first reel; the encoder and the stepper motor control the speed of the tape, so that the metal base tape is wound through the rollers of the multi-channel tr...

Embodiment 2

[0079] The present embodiment provides a method for preparing a high-performance Fe (Se, Te) superconducting thick film on a metal substrate coated with a buffer layer, comprising the following steps:

[0080] Step 1, take the Fe(Se,Te) superconducting target material and install it in the target holder in the cavity;

[0081] Step 2, take the metal base tape coated with the buffer layer and wind it in the multi-channel pulsed laser deposition system:

[0082] Step 2.1, winding one end of the metal base tape coated with a buffer layer onto the first reel;

[0083] In step 2.2, the traction metal base belt is wound on the roller shafts of the multi-channel transmission device multiple times to form a multi-channel metal base belt between the roller shafts;

[0084] Step 2.3, fix the other end of the metal base tape on the first reel; the encoder and the stepper motor control the speed of the tape, so that the metal base tape is wound through the rollers of the multi-channel tr...

Embodiment 3

[0097] The present embodiment provides a method for preparing a high-performance Fe (Se, Te) superconducting thick film on a metal substrate coated with a buffer layer, comprising the following steps:

[0098] Step 1, take the Fe(Se,Te) superconducting target material and install it in the target holder in the cavity;

[0099] Step 2, take the metal base tape coated with the buffer layer and wind it in the multi-channel pulsed laser deposition system:

[0100] Step 2.1, winding one end of the metal base tape coated with a buffer layer onto the first reel;

[0101] In step 2.2, the traction metal base belt is wound on the roller shafts of the multi-channel transmission device multiple times to form a multi-channel metal base belt between the roller shafts;

[0102] Step 2.3, fix the other end of the metal base tape on the first reel; the encoder and the stepper motor control the speed of the tape, so that the metal base tape is wound through the rollers of the multi-channel tr...

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Abstract

The invention relates to a Fe (Se, Te) superconducting thick film and a preparation method and application thereof, and the preparation method of the Fe (Se, Te) superconducting thick film comprises the following steps: depositing a Fe (Se, Te) seed layer on a metal base band plated with a buffer layer by adopting a multi-channel pulse laser deposition method, and then depositing a plurality of Fe (Se, Te) superconducting layers on the Fe (Se, Te) seed layer. Compared with the prior art, the Fe (Se, Te) superconducting thick film prepared by the method has pure C-axis orientation, high superconducting transition temperature, high critical current and high critical current density, and under 4.2 K and self field, the critical current is greater than 300A, and the critical current density is as high as 2.3 MA/cm < 2 >; the Fe (Se, Te) superconducting thick film provided by the invention has high critical current and critical current density in a self field and a magnetic field, can meet high-intensity magnetic field application, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of coated conductors, and relates to a high-performance Fe (Se, Te) superconducting thick film and a preparation method and application thereof. Background technique [0002] Since the research group of Professor H. Hosono of Tokyo Institute of Technology discovered 26K superconductivity in LaFeAsO1-xFx in February 2008, many research groups at home and abroad have reported a series of superconductivity. Layered iron-based compounds, which are collectively referred to as iron-based superconductors, are another important class of high-temperature superconducting materials discovered after cuprate superconductors. Iron-based superconductors can be mainly divided into two categories, namely, iron-selenium (FeSe)-based superconductors and iron-arsenic (FeAs)-based superconductors. Among them, FeSe-based superconductors have the outstanding advantages of large-scale regulation of superconducting critical tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/28C23C14/06C23C14/08
CPCY02E40/60
Inventor 刘林飞李贻杰叶佳超牟韶静朱容稷苗超航柯韶东
Owner SHANGHAI JIAO TONG UNIV
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